One gm. of a metal carbonate gave 0.56 gm. of its oxide on heating. The equivalent mass of the metal is

The pair of compounds that can exist together is

In which of the following compounds, nitrogen exhibits highest oxidation state?

A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the

reaction which element undergoes a maximum change in the oxidation number?

The oxidation states of P in H₄P₂O₅, H₄P₂O₆, H₄P₂O₇, are respectively -

Oxidation numbers of P in ${\mathrm{PO}}_4^{3-}$, of S in ${\mathrm{SO}}_4^{2-}$ and that of Cr in ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ are respectively,

The number of moles of MnO^-₄ required to oxidise one mole of ferrous oxalate completely in an acidic medium is-

Which of the following oxidation states are the most characteristics for lead and tin respectively?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

HNO₂ acts both as reductant and oxidant, while HNO₃ acts only as oxidant. It is due to their .

The valency of Cr in the complex [Cr(H₂O)₄Cl₂]⁺ [MP PMT 2000]

In the conversion ${\text{Br}}_2\mathrm{\hspace{0.17em}}\to \mathrm{\hspace{0.17em}}{\mathrm{BrO}}_3^{-},$ the oxidation state of bromine changes from -

Oxidation number of cobalt in K[Co(CO)₄] is

The oxidation number of nickel in Ni(CO)₄

Sn⁺⁺ loses two electrons in a reaction. The final oxidation number of tin will be-

The oxidation number of S in H₂S₂O₈ is -

The oxidation state of nitrogen in N₃H is-

The oxidation state of Cr in [Cr(NH₃)₄Cl₂]⁺ is [AIEEE 2005]

A brown ring complex compound is formulated as $\left[Fe{\left(H_{2}O\right)}_{5}NO\right]S{O}_4.$ The oxidation state of iron is 

The oxidation number of P in Mg₂P₂O₇ is - 

What is the oxidation number of sulphur in $N{a}_2{S}_4{O}_6$ - 

What is the oxidation number of Co in $\left[Co{\left(N{H}_3\right)}_{4}ClN{O}_2\right]$

When KMnO₄ acts as an oxidising agent and ultimately forms ${\left[Mn{O}_4\right]}^{-2},Mn{O}_2,M{n}_2{O}_3,M{n}^{+2}$ then the number of electrons transferred in each case respectively is -

For the redox reaction $Mn{O}_4^{-}+C_2{O}_4^{-2}+H^{+}\to M{n}^{2+}+C{O}_2+H_{2}O$ the correct coefficients of the reactants for the balanced reaction are 

 The strongest oxidising agent among the following is -

In the balanced chemical reaction,

$I{O}_3^{-}+a{I}^{-}+b{H}^{+}\to c{H}_{2}O+d{I}_2$

a, b, c and d respectively correspond to -

The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is:

In the equation

$H_{2}S+2HN{O}_3\to 2H_{2}O+2N{O}_2+S$

The equivalent weight of hydrogen sulphide is [BVP 2003]

If 1.2 g of metal displace 1.12 litre hydrogen at normal temperature and pressure, equivalent weight of metal would be 

The equivalent weight of phosphoric acid (H₃PO₄) in the reaction $NaOH+H_{3}P{O}_4\to Na{H}_{2}P{O}_4+H_{2}O$ is